Plastic products have become an essential part of our daily life. As an outcome the polymer is produced at an enormous amount in worldwide. The persistent accumulation of plastic waste in the environment has pilot research into marvelous bio degradation strategies, including the advantage of insect-mediated processes. Recent research studies disclose that the gut microbiome diversity in plastic-degrading insects plays a consequential role in the breakdown of traditional polymers including polyethylene (PE), polystyrene (PS), Polypropylene (PP), and others. Insects like mealworms, superworm, and some other insects their dynamic consortium of bacteria in their digestive tracts capable for breakdown of complex large polymers to smaller and less harmful compounds. The biodegradation process is complicated, involving physical fragmentation, microbial colonization, enzymatic hydrolysis and metabolic assimilation. In spite of these advances, the environmental persistence of biodegradable polymers materials remains a challenge. Understanding the adaptability between insect gut microbiome diversity and polymer degradation capability is therefore pivotal for optimizing biotechnological applications aimed at reduce plastics pollution. This chapter exploring the current state of proficiency on insect gut microbiome diversity in plastic degradation, the biochemical pathway involved, the environmental fate of biodegradable polymers, providing perception into exploit this biological system for eco-friendly waste management.